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Anatomy Exam 2 > Forearm > Flashcards

Forearm Flashcards

(66 cards)

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1
Q

The parts of the forearm

A

Radius
ulna
interosseous membrane

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2
Q

What are the forearm joints?

A

Proximal radial ulnar joints
Distal radial ulnar joint

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3
Q

What is the Proximal radial ulnar joint formed by?

A

radial head and the radial notch of the ulna

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4
Q

What does the Proximal radial ulnar joint do?

A
  • is a pivot joint in which the radial head rotates around the radial notch of the ulna
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5
Q

What ligament attaches the Proximal radioulnar joint?

A

Annular ligament- forms a ring around the radial notch and radial head.

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6
Q

What is the distal radioulnar joint formed by?

A

Formed by the ulnar head and the ulnar notch of the radius

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7
Q

What does the distal radial ulnar joint do?

A

is a pivot joint where the ulnar notch of the radius rotates around the ulnar head

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8
Q

What ligament attaches the distal radioulnar joint?

A

Articular disc and dorsal and anterior ligaments(runs transverse from the radius to the ulna)

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9
Q

During supination of the forearm?

A

Palm is up and the ulna and radius are parallel

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10
Q

During Neutral position of the forearm?

A

(Handshake) Ulna and radius are parallel but the radius is superior to the ulna

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11
Q

During pronation of the forearm?

A

Palm is down and the radius is crossed over the ulna

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12
Q

Intermediate layer of the flexor pronator muscles?

A

Flexor digitorum superficialis (FDS)

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13
Q

Deep Layer of the flexor pronator muscles?

A

Flexor digitorum profundus (FDP), Flexor pollicis longus (FPL) and pronator quadratus

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14
Q

What are the 3 flexor layers in the forearm

A

superficial
intermediate
deep

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15
Q

what is included in the superficial layer ?

A

pronator teres, flexor carpi radialis (FCR), palmaris longus, and flexor carpi ulnaris (FCU)

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16
Q

Proximal attachment of Pronator teres

A

Coronoid process of ulna and head of humerus (2 heads)

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17
Q

Distal attachment of Pronator teres

A

Middle of lateral surface of radius

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18
Q

Innervation of Pronator teres

A

Median Nerve (C6, C7)

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19
Q

Main action of Pronator teres

A

Pronates forearm and flexes elbow

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20
Q

Flexor carpi radialis (FCR) Proximal attachment

A

medial epicondyle of humerus

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21
Q

Flexor carpi radialis (FCR) distal attachment

A

Base of (2nd + 3rd) metacarpal

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22
Q

Flexor carpi radialis (FCR) Innervation

A

Median Nerve (C6, C7)

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23
Q

Flexor carpi radialis (FCR) main action

A

Flexes and radial deviation of the wrist

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24
Q

Palmaris longus proximal attachment

A

Medial epicondyle of humerus

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25
Distal attachment of the Palmaris longus
Distal half of flexor retinaculum, palmar aponeurosis
26
Innervation of the Palmaris longus
Median Nerve (C7, C8)
27
Main action of the Palmaris longus
Flexes hand (at wrist) and tenses palmar aponeurosis
28
Proximal attachment of the Flexor carpi ulnaris (FCU)
Olecranon and posterior border of ulna
29
Distal attachment of the Flexor carpi ulnaris (FCU)
Pisiform, hook of hamate, 5th metacarpal
30
Innervation of the Flexor carpi ulnaris (FCU)
Ulnar nerve C7, C8
31
Main action of the Flexor carpi ulnaris (FCU)
Flexes and ulnar deviation of wrist
32
Flexor digitorum superficialis (FDS) Proximal attachment
Medial epicondyle of humerus and coronoid process of ulna - Oblique line of radius
33
Flexor digitorum superficialis (FDS) distal attachment
Shafts of middle phalanges of medial four digits
34
Flexor digitorum superficialis (FDS) innervation
median nerve (C7, C8, T1)
35
Flexor digitorum superficialis (FDS) actions
Flexes wrist joint, flexes proximal interphalangeal joints of middle four digits
36
Flexor digitorum profundus (FDP) Proximal attachment
Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane
37
Flexor digitorum profundus (FDP) distal attachment
Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
38
Flexor digitorum profundus (FDP) Innervation
lateral part (to digits 2 and 3): median nerve (C8, T1) Medial part (to digits 4 and 5): ulnar nerve (C8, T1)
39
Flexor digitorum profundus (FDP) actions?
Flexes wrist joint carpometacarpal joints
40
Flexor pollicis longus proximal attachment
Anterior surface of radius and interosseous membrane
41
Flexor pollicis longus distal attachment
base of distal phalanx of thumb
42
Flexor pollicis longus innervation
median nerve
43
Flexor pollicis longus actions
Flexes wrist joint, carpometacarpal joints Flexes metacarpophalangeal and interphalangeal joints of thumb
44
Pronator quadratus proximal attachment
distal quarter of anterior surface of ulna
45
Pronator quadratus distal attachment
Distal quarter anterior surface of radius
46
Pronator quadratus innervation
median nerve
47
Pronator quadratus actions
Pronates forearm, binds radius and ulna together
48
what do the tendons of the extensor muscles do?
cross the wrist and are held in place by the extensor retinaculum and prevents bowstringing
49
What is included in the 1st dorsal compartment
abductor pollicis longus and extensor pollicis brevis
50
What is included in the 2nd dorsal compartment
Extensor carpi radialis longus and extensor carpi radialis brevis
51
What is the proximal attachment of the brachioradialis
Proximal two thirds of lateral supraepicondylar ridge of humerus
52
What is the distal attachment of the brachioradialis
Lateral surface of distal end of radius proximal to styloid process
53
What is the innervation of the brachioradialis
Radial nerve
54
What are the actions of the brachioradialis
Relatively weak flexion of elbow joint, maximal when forearm is in midpronated position
55
What is the proximal attachment of the Extensor carpi radialis longus
Lateral supraepicondylar ridge of humerus
56
What is the distal attachment of the Extensor carpi radialis longus
Dorsal aspect of base of 2nd metacarpal
57
What is the innervation of the Extensor carpi radialis longus
Radial nerve
58
What are the actions of the Extensor carpi radialis longus
Extends and abduct wrist joint; extends carpometacarpal joints
59
What is the proximal attachment of the Extensor carpi radialis brevis
Lateral epicondyle of humerus
60
What is the distal attachment of the Extensor carpi radialis brevis
Dorsal aspect of base of 3rd metacarpal
61
What are the actions of the Extensor carpi radialis brevis
Extends and abduct wrist joint; extends carpometacarpal joints + fist clenching
62
What is the innervation of the Extensor carpi radialis brevis
Radial nerve
63
What is the proximal attachment of the Extensor digitorum
Lateral epicondyle of humerus
64
What is the distal attachment of the Extensor digitorum
Extensor expansions of medial four fingers
65
What innervates of the Extensor digitorum
Radial Nerve
66

Anatomy Exam 2 (3 decks)

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